MikroTik RB750Gr3: OpenWrt Compatibility Report
The MikroTik RB750Gr3 runs OpenWrt 25.12.2 on the ramips/mt7621 target, and has been supported since 19.07.0. Its No WiFi wireless on the none driver rates fair for open-source driver support (0.50/1.0), installation is rated moderate, and it is still sold new.
Hardware data and retail listings last checked .
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Specifications
| SoC | MediaTek MT7621AT |
|---|---|
| CPU | 2 cores @ 880 MHz |
| RAM | 256 MB |
| Flash | 16 MB |
| Ethernet ports | 5 |
| USB | 1x 2.0 |
| WiFi generation | No WiFi |
| WLAN driver | none |
| OpenWrt target | ramips / mt7621 |
| Package architecture | mipsel_24kc |
| Current release | 25.12.2 |
| Supported since | 19.07.0 |
| Install method | Mikrotik TFTP |
| Install difficulty | moderate |
| Power supply | 8-30 VDC, Passive PoE |
| Device type | Home router |
| Estimated throughput | 220 Mbps |
| Availability | available |
Installing OpenWrt on the RB750Gr3
Installation on this device is rated moderate. Expect to use a recovery mode, TFTP or a vendor tool rather than a plain web upload. Documented methods: Mikrotik TFTP.
Official OpenWrt device page for the RB750Gr3
Flashing third-party firmware can brick a router and usually voids the warranty. Always check that the firmware image matches your exact hardware version.
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